According to Serge on WhiskyFun it is a vatting of Glenlivet and Glen Grant:
Blue Hanger 25 yo (45.6%, Berry Bros, Glen Grant/Glenlivet vatting, 2003) Colour: amber. Nose: really classic. Caramelised apple, sherry, dried orange, tropical fruits (guava). Most enjoyable. Develops on milk caramel and herbal tea. Lime tree, camomile. Cappuccino, vanilla creme. Really nice and enjoyable… again, a classic, with some very nice sherry. Mouth: nice, quite creamy and very satisfying. Dried orange, chocolate, vanilla, sherry. Gets a little winey. Hints of white pepper, soft tannins. Medium finish, on toffee. Again and again, a true classical Speysider, nicely sherried. Not too complex, but really enjoyable.
So it looks like it there may have been a couple of expressions - you may want to ask Berry Bros & Rudd to confirm/advise.